US6089835A - Portable compressor - Google Patents
Portable compressor Download PDFInfo
- Publication number
- US6089835A US6089835A US09/215,379 US21537998A US6089835A US 6089835 A US6089835 A US 6089835A US 21537998 A US21537998 A US 21537998A US 6089835 A US6089835 A US 6089835A
- Authority
- US
- United States
- Prior art keywords
- housing
- accordance
- portable compressor
- power transmitting
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
Definitions
- the present invention relates to a portable compressor comprising a motor, a compression mechanism connected to the motor via a power transmitting mechanism and driven by the rotational force of the motor, and an air tank storing compression air produced by the compression mechanism.
- a portable compressor (refer to Japanese Patent No. Sho 62-21998), according to which a motor and a power transmitting mechanism (collectively referred to as a driving mechanism) are in parallel with an air tank.
- the air tank and the driving mechanism are connected each other at one end via a compression mechanism, comprising a cylinder etc., and a connecting member such as a stay.
- auxiliary devices or accessories including a pressure-reducing valve and a pressure switch, are disposed in a space formed at the other end of the air tank and the driving mechanism.
- the compression mechanism and the connecting member are located in a direction normal to the longitudinal axes of the driving mechanism and the air tank.
- This layout or arrangement is disadvantageous in realizing the downsizing of the compressor.
- An object of the present invention is to provide a portable compressor compact in size, simple in arrangement, and low in manufacturing cost.
- the present invention provides a portable compressor comprising a motor for generating a rotational force, a compression mechanism including a member driven by the rotational force transmitted from the motor via a power transmitting mechanism, and an air tank storing compression air produced by the compression mechanism.
- the motor and the power transmitting mechanism are accommodated and supported in a two-piece housing unit separable into first and second housings, and the air tank is defined by an outer surface of the second housing and an inside surface of a third housing provided on the second housing.
- the first to third housings are mold or cast products.
- the compression mechanism is located adjacent to the third housing.
- a top level of the compression mechanism is substantially the same as that of the third housing.
- a ring groove is formed along flanged peripheries of the second and third housings.
- a seal member is inserted into the ring groove.
- the second and third housings are airtightly fixed via the seal member by means of fastening members.
- the second housing has a recessed portion on the outer surface thereof, and the third housing is provided on the recessed portion of the second housing.
- the two-piece housing unit is separable along a plane including the axes of the motor and the a power transmitting mechanism.
- the power transmitting mechanism includes a drive shaft and an output shaft connected by an elastic element.
- a plurality of locating snap rings are provided for positioning the shafts of the power transmitting mechanism in a closed chamber accommodating the elastic member.
- the elastic element may be held by holders having a restricting mechanism for limiting an angular deviation between the drive shaft and the output shaft.
- the compression mechanism overhangs from the second housing, leaving a space available for locating the air tank.
- a mounting portion is integrally formed on an outer surface of the air tank for fixing auxiliary devices of the compressor.
- the auxiliary devices are disposed in a stepped portion of the two-piece housing unit formed due to an offset arrangement for locating gears in the power transmitting mechanism.
- FIG. 1 is a cross-sectional view showing an arrangement of a portable compressor in accordance with a preferable embodiment of the present invention
- FIG. 2 is a cross-sectional view taken along a line A--A shown in FIG. 1;
- FIG. 3 is a side view showing the portable compressor shown in FIG. 1;
- FIG. 4 is a front view showing the portable compressor shown in FIG. 1;
- FIG. 5 is a cross-sectional view taken along a line B--B shown in FIG. 1;
- FIG. 6 is a view exclusively showing a driving mechanism of the portable compressor shown in FIG. 1;
- FIG. 7 is a composite view showing a modified arrangement of a coil spring and spring holders employed in the portable compressor shown in FIG. 1, including a cross-sectional view (A) showing a relationship between the coil spring and the spring holders and side views (B) and (C) showing the spring holders from inside thereof;
- FIG. 8 is a side view showing another modified arrangement of the coil spring and the spring holders
- FIG. 9 is a composite view showing another modified arrangement of the coil spring and the spring holders, including a front view (A) and a side view (B) respectively showing the coil spring, a cross-sectional view (C) showing a relationship between the coil spring and the spring holders, and a side view (D) showing the spring holder from inside thereof; and
- FIG. 10 is a cross-sectional view showing another elastic member employed in the portable compressor shown in FIG. 1.
- a motor 1 generates a rotational force for driving a compressor.
- a pinion 8 is securely fixed to the output shaft of the motor 1.
- a gear 9 meshes with the pinion 8.
- Rotation of the drive shaft 10 is transmitted to an output shaft 12 via a coil spring 11.
- the output shaft 12 is connected to a piston 14 via a connecting rod 13 and, when rotating, causes the piston 14 to reciprocate in the axial direction of a cylinder 15.
- An intake valve (not shown), provided in a cylinder head 16, opens in response to the negative pressures in the cylinder 15. Air is introduced into the cylinder 15 via an air intake port 28, a crank chamber 18, a pipe 19, and the cylinder head 16. The intake valve is closed when the piston 14 slides upward. The air confined in the cylinder 15 is compressed by the piston 14 moving upward.
- An exhaust valve (not shown), provided in the cylinder head 16, opens when the pressure of the compression air reaches a predetermined level. The compression air is discharged from the cylinder 15 via the cylinder head 16, the pipe 17 etc. and stored in the air tank 3.
- the cylinder head 16 has air flow passages independent from each other and dedicated to the intake and exhaust operations, respectively.
- the compression air stored in the air tank 3 is supplied to a pneumatically operated machine (not shown), such as a nail driver, via the pressure-reducing valve 21 and a socket 27 shown in FIG. 4.
- a housing 4 accommodates and supports the driving mechanism including the motor 1 and the power transmitting mechanism.
- the power transmitting mechanism comprises the pinion 8, the gear 9, the drive shaft 10, the coil spring 11, and the output shaft 12.
- the housing 4 is a two-piece housing unit separable into a first housing 5 and a second housing 6, when divided along a plane including the axes of the motor 1, the drive shaft 10, and the output shaft 12.
- the first and second housings 5 and 6 cooperatively form the crank chamber 18 of a compression mechanism 2.
- the cylinder 15 extends upward from the second housing 6 with an axis normal to the output shaft 12.
- a recessed portion 50 is formed on the second housing 6 and extends entirely along the upper (outer) surface thereof, except for the region occupied by the compression mechanism 2 including the cylinder 15.
- a third housing 7 has a hollow inside space 7b with a flanged periphery 7a coupled with a flanged periphery 6a of the second housing 6 (i.e., the recessed portion 50).
- the second housing 6 and the third housing 7 are airtightly fastened by means of bolts 22 along their flanged peripheries 6a and 7a, so as to form the air tank 3. More specifically, a ring groove is formed along the flanged peripheries 6a and 7a of the second housing 6 and the third housing 7.
- the first housing 5, the second housing 6, and the third housing 7 are aluminum die-casts or similar mold products.
- the compression mechanism 2 is adjacent to the third housing 7.
- the top level of the compression mechanism 2 is substantially the same as that of the third housing 7.
- the preferable embodiment of the present invention discloses the portable compressor comprising the motor 1 for generating a rotational force, the compression mechanism 2 including a member (i.e., piston 14) driven by the rotational force transmitted from the motor 1 via the power transmitting mechanism 8 ⁇ 12, and the air tank 3 storing compression air produced by the compression mechanism 2.
- the motor 1 and the power transmitting mechanism 8 ⁇ 12 are accommodated and supported in a two-piece housing unit 4 separable into first and second housings 5 and 6, and the air tank 3 is defined by an outer surface of the second housing 6 and an inside surface of a third housing 7 provided outside the second housing 6.
- the first to third housings 5 ⁇ 7 are mold or cast products.
- the compression mechanism 2 is located adjacent to the third housing 7, and the top level of the compression mechanism 2 is substantially the same as that of the third housing 7.
- the groove is formed along flanged peripheries 6a and 7a of the second and third housings 6 and 7.
- the seal member 23 is inserted into the groove.
- the second and third housings 6 and 7 are airtightly fixed via the seal member 23 by means of fastening members (i.e., volts 22).
- the second housing 6 has a recessed portion 50 on the outer surface thereof, and the third housing 7 is provided on the recessed portion 50 of said second housing 6.
- the two-piece housing unit 4 is separable into the first and second housings 5 and 6 along the plane including the axes of the motor 1, the drive shaft 10, and the output shaft 12.
- the motor 1 and the power transmitting mechanism 8 ⁇ 12 are easily installed and held accurately at predetermined positions in the second housing 6.
- the assembling of the motor 1 and the power transmitting mechanism 8 ⁇ 12 is easily accomplished by uniting the first and second housings 5 and 6.
- each locating snap ring 24 acts as a sealing member for accommodating the coil spring 11 in a closed chamber 52.
- the air tank 3 is constituted by two-piece housings, i.e., by the second housing 6 and the third housing 7.
- the second housing 6 is also part of the two-piece housing unit 4.
- this arrangement is effective to reduce the total number of parts constituting the air tank 3.
- the gap between the second housing 6 and the third housing 7 is airtightly sealed by the packing 23.
- the second housing 6 and the third housing 7 are securely fastened by the bolts 22. This arrangement requires no welding operation and no mounting parts for fixing the air tank to the housing.
- the compression mechanism 2 overhangs from the second housing 6, leaving a space available for locating something. According to the above-described embodiment, this space is used for locating the air tank 3. In other words, the compressor becomes compact.
- the second housing 6, as shown in FIG. 1, has the recessed portion 50 inevitably formed on its outer surface due to formation of the bearing chamber or the like. As shown in FIG. 5, dead spaces "C" are inevitably formed at the corners of the recessed portion 50 when the wall of the second housing 6 is configured into a round shape so as to accommodate or support the cylindrical member, such as the motor 1. By utilizing this recessed portion 50 (i.e., dead space) for the air tank 3, it becomes possible to substantially increase the capacity of the air tank 3.
- the mounting portions 54 integrally on the outer surface of the air tank 3 in the manufacturing process for molding the housings 6 and 7. This makes it possible to eliminate any welding operation and mounting parts for fixing the auxiliary devices, such as the pressure-reducing valve 21 and the pressure switch 26.
- auxiliary devices are disposed in a stepped portion 30 of the housing unit 4 formed due to an offset arrangement for locating the pinion 8 and the gear 9 in the power transmitting mechanism. This arrangement is advantageous in that the compressor becomes compact.
- FIG. 6 shows only the driving mechanism extending from the motor 1 via the power transmitting mechanism 8 ⁇ 12 to the piston 14.
- the drive shaft 10, equipped with the gear 9, is securely fixed to a spring holder 31 at the other end.
- the output shaft 12, connected to a flywheel 20 at one end, is securely fixed to another spring holder 32 at the other end.
- the spring holder 32 faces to the spring holder 31 and is rotatable independently.
- the spring holders 31 and 32 are connected via the coil spring 11. Both ends 11a of the coil spring 11 extend parallel to the axes of the drive shaft 10 and the output shaft 12. With this arrangement, it becomes possible to absorb the shock caused by a sudden change in the rotation of the drive shaft 10 and/or the output shaft 12.
- the compressor is subjected to load variations which cause the noises.
- connecting the drive shaft 10 to the output shaft 12 via the coil spring 11 is effective to reduce the natural frequency of the compressor axle arrangement below the load variation frequency.
- the noises can be suppressed.
- the compressor can be downsized.
- FIG. 7 shows another example of the spring holders 31 and 32.
- the spring holder 31 has a key-way equipped bore 31a and two opposed projections 31b protruding inward from the cylindrical wall of the bore 31a.
- the spring holder 32 has a key-way equipped bore 32a and two opposed projections 32b protruding inward from the cylindrical wall of the bore 32a.
- an angular deviation between the drive shaft 10 and the output shaft 12 exceeds 60°, the projections 31b collide with the projections 32b to limit the angular deviation between the drive shaft 10 and the output shaft 12.
- FIG. 9 shows another example of the spring holders 31 and 32.
- Each spring holder 31 (32) has a fixing hole 31d (32d).
- the end 11a of the spring coil 11 is bent radially inward and inserted into the fixing hole 31d (32d).
- the coil spring 11 can be tightly and stably fixed to the spring holders 31 and 32.
- FIG. 10 shows another elastic member replaceable for the coil spring 11.
- Damper holders 10a and 12a are attached to the ends of the drive shaft 10 and the output shaft 12, respectively.
- a rubber damper 90 is provided between the damper holders 10a and 12a.
- Guides members 10b and 12b extend inward from the damper holders 10a and 12a and are inserted into a central bore of the rubber damper 90.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
Abstract
Description
Claims (12)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35724997A JPH11190275A (en) | 1997-12-25 | 1997-12-25 | Compressor |
JP9-357249 | 1997-12-25 | ||
JP10-085362 | 1998-03-31 | ||
JP8536298A JPH11280653A (en) | 1998-03-31 | 1998-03-31 | Portable compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US6089835A true US6089835A (en) | 2000-07-18 |
Family
ID=26426378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/215,379 Expired - Lifetime US6089835A (en) | 1997-12-25 | 1998-12-18 | Portable compressor |
Country Status (1)
Country | Link |
---|---|
US (1) | US6089835A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040047745A1 (en) * | 2002-09-06 | 2004-03-11 | Burkholder Robert F. | Air compressor assembly having enclosed unpainted air tank |
US20040127935A1 (en) * | 1999-10-27 | 2004-07-01 | Atritech, Inc. | Filter apparatus for ostium of left atrial appendage |
US20040265132A1 (en) * | 2003-06-24 | 2004-12-30 | Hitachi Koki, Co., Ltd. | Pressure switch mechanism and air compressor using the same mechanism |
US20040265134A1 (en) * | 2003-06-24 | 2004-12-30 | Hitachi Koki Co., Ltd. | Air compressor and control method therefor |
US20050031458A1 (en) * | 2003-08-07 | 2005-02-10 | Brashears Richard K. | Portable air compressor |
US20050129542A1 (en) * | 2003-12-15 | 2005-06-16 | Collings Douglas A. | Compressor assembly with piston having multiple cross sections |
US20060104836A1 (en) * | 2003-01-27 | 2006-05-18 | Alan Phillips | Cordless compressor |
US20060147316A1 (en) * | 2004-09-27 | 2006-07-06 | Santa Ana Roland C | Quiet fluid pump |
US20060180566A1 (en) * | 2005-01-26 | 2006-08-17 | Mataya Marc J | Closure cap for a container having time-date indicators |
US7175400B2 (en) | 2003-12-15 | 2007-02-13 | Tecumseh Products Company | Compressor assembly with reciprocating piston and vented cylinder |
US20070059186A1 (en) * | 2001-04-30 | 2007-03-15 | Black & Decker Inc. | Pneumatic compressor |
US7225959B2 (en) | 2001-04-30 | 2007-06-05 | Black & Decker, Inc. | Portable, battery-powered air compressor for a pneumatic tool system |
WO2007140596A1 (en) | 2006-06-08 | 2007-12-13 | Larry Alvin Schuetzle | Reciprocating compressor or pump and a portable tool powering system including a reciprocating compressor |
US20080181794A1 (en) * | 2007-01-26 | 2008-07-31 | Steinfels Craig R | Mobile pneumatic compressor |
US20080187447A1 (en) * | 2007-02-05 | 2008-08-07 | Steinfels Craig R | Air compressor |
CN102966514A (en) * | 2012-11-05 | 2013-03-13 | 无锡新大力电机有限公司 | Motor direct drive-type air compressor |
EP2886862A1 (en) | 2013-12-17 | 2015-06-24 | Kaeser Kompressoren Se | Compressor |
US10167863B1 (en) | 2012-03-28 | 2019-01-01 | Pumptec, Inc. | Proportioning pump, control systems and applicator apparatus |
US10760557B1 (en) | 2016-05-06 | 2020-09-01 | Pumptec, Inc. | High efficiency, high pressure pump suitable for remote installations and solar power sources |
US10823160B1 (en) | 2017-01-12 | 2020-11-03 | Pumptec Inc. | Compact pump with reduced vibration and reduced thermal degradation |
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US5137434A (en) * | 1990-10-04 | 1992-08-11 | Devilbiss Air Power Company | Universal motor oilless air compressor |
US5720423A (en) * | 1995-07-25 | 1998-02-24 | Makita Corporation | Fastener driving tool |
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US3849028A (en) * | 1972-10-16 | 1974-11-19 | Sanyo Electric Co | Structure for supporting a motor-compressor unit in a housing |
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US3947160A (en) * | 1974-11-21 | 1976-03-30 | Ingersoll-Rand Company | Housing and shaft arrangement |
US4080105A (en) * | 1975-07-14 | 1978-03-21 | Connell Edwin E | Tire inflator |
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Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040127935A1 (en) * | 1999-10-27 | 2004-07-01 | Atritech, Inc. | Filter apparatus for ostium of left atrial appendage |
US7225959B2 (en) | 2001-04-30 | 2007-06-05 | Black & Decker, Inc. | Portable, battery-powered air compressor for a pneumatic tool system |
US7494035B2 (en) | 2001-04-30 | 2009-02-24 | Black & Decker Inc. | Pneumatic compressor |
US20070059186A1 (en) * | 2001-04-30 | 2007-03-15 | Black & Decker Inc. | Pneumatic compressor |
US20040047745A1 (en) * | 2002-09-06 | 2004-03-11 | Burkholder Robert F. | Air compressor assembly having enclosed unpainted air tank |
US20060104836A1 (en) * | 2003-01-27 | 2006-05-18 | Alan Phillips | Cordless compressor |
US20040265132A1 (en) * | 2003-06-24 | 2004-12-30 | Hitachi Koki, Co., Ltd. | Pressure switch mechanism and air compressor using the same mechanism |
US20040265134A1 (en) * | 2003-06-24 | 2004-12-30 | Hitachi Koki Co., Ltd. | Air compressor and control method therefor |
US7326038B2 (en) | 2003-06-24 | 2008-02-05 | Hitachi Koki Co., Ltd. | Pressure switch mechanism and air compressor using the same mechanism |
US7641449B2 (en) | 2003-06-24 | 2010-01-05 | Hitachi Koki Co., Ltd. | Air compressor having a controller for a variable speed motor and a compressed air tank |
US20050031458A1 (en) * | 2003-08-07 | 2005-02-10 | Brashears Richard K. | Portable air compressor |
US7273355B2 (en) | 2003-12-15 | 2007-09-25 | Tecumseh Products Company | Compressor assembly with piston having multiple cross sections |
US7175400B2 (en) | 2003-12-15 | 2007-02-13 | Tecumseh Products Company | Compressor assembly with reciprocating piston and vented cylinder |
US20050129542A1 (en) * | 2003-12-15 | 2005-06-16 | Collings Douglas A. | Compressor assembly with piston having multiple cross sections |
US20060147316A1 (en) * | 2004-09-27 | 2006-07-06 | Santa Ana Roland C | Quiet fluid pump |
US7563077B2 (en) * | 2004-09-27 | 2009-07-21 | Santa Ana Roland C | Quiet fluid pump |
US20060180566A1 (en) * | 2005-01-26 | 2006-08-17 | Mataya Marc J | Closure cap for a container having time-date indicators |
US7661384B2 (en) | 2005-01-26 | 2010-02-16 | Marc J Mataya | Closure cap for a container having time-date indicators |
US8721300B2 (en) | 2006-06-08 | 2014-05-13 | Larry Alvin Schuetzle | Reciprocating compressor or pump and a portable tool powering system including a reciprocating compressor |
WO2007140596A1 (en) | 2006-06-08 | 2007-12-13 | Larry Alvin Schuetzle | Reciprocating compressor or pump and a portable tool powering system including a reciprocating compressor |
US20080003119A1 (en) * | 2006-06-08 | 2008-01-03 | Schuetzle Larry A | Reciprocating compressor or pump and a portable tool powering system including a reciprocating compressor |
US20080003112A1 (en) * | 2006-06-08 | 2008-01-03 | Schuetzle Larry A | Reciprocating compressor or pump and a portable tool powering system including a reciprocating compressor |
EP3431763A1 (en) | 2006-06-08 | 2019-01-23 | Larry Alvin Schuetzle | Reciprocating compressor or pump and a portable tool powering system including a reciprocating compressor |
US7959415B2 (en) | 2006-06-08 | 2011-06-14 | Larry Alvin Schuetzle | Radial type reciprocating compressor and portable tool powering system with cylinder liner, valve and annular manifold arrangement |
US7980829B2 (en) | 2006-06-08 | 2011-07-19 | Larry Alvin Schuetzle | Radial type reciprocating compressor and portable tool powering system with flexing connecting rod arrangement |
US20080181794A1 (en) * | 2007-01-26 | 2008-07-31 | Steinfels Craig R | Mobile pneumatic compressor |
US7762790B2 (en) * | 2007-02-05 | 2010-07-27 | Black & Decker Inc. | Air compressor |
US20080187447A1 (en) * | 2007-02-05 | 2008-08-07 | Steinfels Craig R | Air compressor |
US10167863B1 (en) | 2012-03-28 | 2019-01-01 | Pumptec, Inc. | Proportioning pump, control systems and applicator apparatus |
CN102966514A (en) * | 2012-11-05 | 2013-03-13 | 无锡新大力电机有限公司 | Motor direct drive-type air compressor |
EP2886862A1 (en) | 2013-12-17 | 2015-06-24 | Kaeser Kompressoren Se | Compressor |
WO2015091587A1 (en) * | 2013-12-17 | 2015-06-25 | Kaeser Kompressoren Se | Compressor |
CN106164487A (en) * | 2013-12-17 | 2016-11-23 | 凯瑟压缩机欧洲股份公司 | Compressor |
US10677236B2 (en) | 2013-12-17 | 2020-06-09 | Kaeser Kompressoren Se | Compressor |
US10760557B1 (en) | 2016-05-06 | 2020-09-01 | Pumptec, Inc. | High efficiency, high pressure pump suitable for remote installations and solar power sources |
US10823160B1 (en) | 2017-01-12 | 2020-11-03 | Pumptec Inc. | Compact pump with reduced vibration and reduced thermal degradation |
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